TY  - RPRT
TI  - Air quality improvement estimation and assessment using contingent valuation method, a case study in Beijing.
AU  - X J Wang
AU  - W Zhang
AU  - Y Li
AU  - K Z Yang
AU  - M Bai
PY  - 2006
DO  - 10.1007/s10661-005-9054-z
UR  - https://pubmed.ncbi.nlm.nih.gov/16770506/
ID  - 16770506
ER  -